Question

计算：【（x-y）的2次幂】的3次幂乘（x-y）乘【（x-y）的3次幂】的4次幂

Answer 1

[(x-y)^2]^3*(x-y)*[(x-y)^3]^4

=(x-y)^6*(x-y)(x-y)^12

=(x-y)^19